4023730 has 16 divisors (see below), whose sum is σ = 7669080. Its totient is φ = 1514752.

The previous prime is 4023727. The next prime is 4023731. The reversal of 4023730 is 373204.

4023730 = 26² + 27² + ... + 229².

It can be written as a sum of positive squares in 4 ways, for example, as 3426201 + 597529 = 1851^2 + 773^2 .

It is a super-2 number, since 2×4023730² = 32380806225800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4023698 and 4023707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4023731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11665 + ... + 12004.

Almost surely, 2^4023730 is an apocalyptic number.

4023730 is a deficient number, since it is larger than the sum of its proper divisors (3645350).

4023730 is a wasteful number, since it uses less digits than its factorization.

4023730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23693.

The product of its (nonzero) digits is 504, while the sum is 19.

The square root of 4023730 is about 2005.9237273635. The cubic root of 4023730 is about 159.0533950385.

Adding to 4023730 its reverse (373204), we get a palindrome (4396934).

It can be divided in two parts, 4023 and 730, that added together give a triangular number (4753 = T₉₇).

The spelling of 4023730 in words is "four million, twenty-three thousand, seven hundred thirty".